SEGMENT INFORMATION, Capital Expenditures by Reportable Segment (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information, Capital Expenditures [Abstract]
Capital Expenditures	$ 891,678	$ 951,679	$ 991,586
Reportable Segments | Cable
Segment Reporting Information, Capital Expenditures [Abstract]
Capital Expenditures	743,524	806,678	850,061
Reportable Segments | Lightpath
Segment Reporting Information, Capital Expenditures [Abstract]
Capital Expenditures	109,749	111,830	93,460
Reportable Segments | Other
Segment Reporting Information, Capital Expenditures [Abstract]
Capital Expenditures	$ 38,405	$ 33,171	$ 48,065